SAPHARI

The research project was promoted by the EC Eurostars section and entirely financed by MIUR.

The SAPHARI program is aimed at the development of a 3D ultrasonic Non Destructive Testing equipment.

This equipment will include the following elements:

  • A 2D ultrasonic image acquisition equipment (Acquisition subsystem), which has been developed by DASEL as an evolution of an existing system. This equipment will include the means for the movement of the acoustic probe (motors and encoders).
  • The comparison between the standard technology like piezoelectric probe with new acoustic technology like CMUT developed by the Roma3 University.
  • A communication link between the 2D image acquisition equipment and an external computing hardware.
  • A computing hardware, which could be based on GPU, and which is in charge to implement the algorithms for converting a set of 2D images into a 3D image.
  • The algorithm for converting the set of 2D images into a 3D image (SAFT).
  • Software for basic rendering, measuring and analysing the 3D image.

Several images obtained by scanning with an ultrasound array at different positions are combined to improve resolution in the movement direction. Individual images are obtained with the phased-array technique in real time with a specialized hardware. These images are combined with the SAFT technique implemented by software running in GPU hardware.

 

Example 4

S3T

The research project funded by Lazio Innova deals with the problem of the areas subject to pollution control. In particular, the aim of the project was to verify the sections under the coasts and river bays. The project was carried out by a temporary group of different companies located in the roman area. Dune was in charge of analysing hyper-spectral and visible images in order to classify and mark the contaminated areas from the non-contaminated ones. It was also faced the problem of the quantitative measure of the image quality before performing its electronic storage. In addition to reconsidering the classic algorithms of surface segmentation through the brightness gradient we tried to define the procedures of innovative analyses. During the work implementation it were in fact introduced original classification algorithms based on the covariance matrix obtained in the different spectral bands and on the spatial components examination in the bi-dimensional transformed domain.

Example 2

EXPLORERS

Research project funded by Lazio Innova. Dune has coordinated Research Centres and Universities.

The exploring activity of complex underground systems, natural or artificial, is often conditioned by access difficulty. In some cases, the very irregular walks of the paths, with twists and turns, bottlenecks and differences in altitudes influence both the outfitting necessary to frequent these locations and provide their documentation. In fact, it is to be taken into account the possibility that environmental conditions can limit or even completely prevent the use of electronic equipment inside the cave.

The Arianna system allows to provide a quick answer to this kind of problem. In fact, it is enough to perform a path inside the area to extract an expedition map of the location. When it happens to reach more than one time the same point it is possible to take advantage of this event to considerably improve the reconstructed map. The production of the map is obtained with the CTX tool software described in the area of interest of the ARIANNA product.

Example 1

ATOMOS

The research project funded by Lazio Innova deals with the problem of analysis, implementation and evaluation of registration algorithms in the field of three-dimensional and multi-modal medical images. Dune has coordinated the activities of a partner company and three scientific centres in the medical field. During the activity a reasonable number of registration algorithms for mono-modal images was evaluated. First of all the software implementation of a specific algorithm was described (Mutual Information, MI), selected both for its description in literature as a particular efficient algorithm and for its usability in the case of mono-modal and multi-modal images. Throughout the research further algorithms were also analysed: Correlation Ratio, CR and Normalized Gradient Field, NGF. All these algorithms were improved with the introduction of original ideas and implemented in SW using the C++ programming language. It was also included the section of interface regarding the images file management in DICOM format.

Example 3

TOMPACO Project – Marine Temperature Control

M.I.U.R. – MURST, Mediterranean Environment Research Program The system has been designed to measure the marine temperature fields by passive acoustic tomography.

DUNE has focused its activities in project coordination, acoustic propagation model study and synthesis and optimization of the tomographic algorithms.

The company has also leaded the validation campaign at the Atlantic Ocean.

SENSI Project – Laser integrated System

M.I.U.R. – MURST, Mediterranean Environment Research Program The system has integrated an incoherent laser range finder with a passive stereo optical system based on image processing from visible spectrum cameras.

DUNE has designed the system architecture as well the laser data acquisition, development of the stereo-vision algorithms and of the visualization SW.

The system has been developed on a cluster of 8 DSP Hammerhead.